<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>商品列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图区域 -->
    <el-card>
      <el-row :gutter='20'>
        <el-col :span='8'>
          <!-- 搜索与清空 -->
          <el-input placeholder="请输入内容" v-model="queryInfo.query" clearable @clear="getGoodsList">

            <el-button slot="append" icon="el-icon-search" @click="getGoodsList"></el-button>
          </el-input>
        </el-col>
        <el-col :span='4'>
          <el-button type='primary' @click="goAddPage">添加商品</el-button>
        </el-col>
      </el-row>

      <!-- table表格区域 -->
      <el-table :data='goodslist' border stripe>
        <el-table-column type='index'></el-table-column>
        <el-table-column label='商品名称' prop='goods_name'></el-table-column>
        <el-table-column label='商品价格(元)' prop='goods_price' width='95px'></el-table-column>
        <el-table-column label='商品重量' prop='goods_weight' width='80px'></el-table-column>
        <el-table-column label='创建时间' prop='add_time' width='170px'>
          <template slot-scope="scope">
            {{scope.row.add_time | dateFormat}}
          </template>
        </el-table-column>

        <el-table-column label='操作' width='130px'>
          <template slot-scope="scope">
            <el-button type="primary" icon="el-icon-edit" size='mini' @click="openEditGoods(scope.row.goods_id)"></el-button>
            <el-button type="danger" icon="el-icon-delete" size='mini' @click="removeById(scope.row.goods_id)"></el-button>
          </template>
        </el-table-column>
      </el-table>

      <!-- 分页区域 -->
      <el-pagination @size-change="handleSizeChange" @current-change="handleCurrentChange" :current-page="queryInfo.pagenum" :page-sizes="[5, 10, 20, 40]" :page-size="queryInfo.pagesize" layout="total, sizes, prev, pager, next, jumper" :total="total" background>
      </el-pagination>
    </el-card>

    <!-- 修改商品对话框 -->
    <el-dialog title="修改商品信息" :visible.sync="editGoodVisible" width="50%" @close="editDialogClosed">
      <!-- 主体内容区域 -->
      <el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="100px">
        <el-form-item label="商品名称" prop="goods_name">
          <el-input v-model="editForm.goods_name"></el-input>
        </el-form-item>
        <el-form-item label="商品价格" prop="goods_price">
          <el-input v-model="editForm.goods_price" type="number"></el-input>
        </el-form-item>
        <el-form-item label="商品重量" prop="goods_weight">
          <el-input v-model="editForm.goods_weight" type="number"></el-input>
        </el-form-item>
      </el-form>

      <span slot="footer" class="dialog-footer">
        <el-button @click="editGoodVisible = false">取 消</el-button>
        <el-button type="primary" @click="editGoods">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      // 查询参数对象
      queryInfo: {
        query: '',
        pagenum: 1,
        pagesize: 10
      },
      // 商品列表
      goodslist: [],
      // 总数据条数
      total: 0,
      editGoodVisible: false,
      editForm: {},
      editFormRules: {
        goods_name: [{
          required: true, message: '请输入商品名称', trigger: 'blur'
        }],
        goods_price: [{
          required: true, message: '请输入商品价格', trigger: 'blur'
        }],
        goods_weight: [{
          required: true, message: '请输入商品重量', trigger: 'blur'
        }]
      }
    }
  },
  created() {
    this.getGoodsList()
  },
  methods: {
    // 根据分页获取对应的商品列表
    async getGoodsList() {
      const { data: res } = await this.$http.get('goods', { params: this.queryInfo })

      if (res.meta.status !== 200) return this.$message.error('获取商品列表失败！')

      this.$message.success('获取商品列表成功！')
      // console.log(res.data)
      this.goodslist = res.data.goods
      this.total = res.data.total
    },
    // 每页显示数据条数变化
    handleSizeChange(newSize) {
      this.queryInfo.pagesize = newSize
      this.getGoodsList()
    },
    // 页码值变化
    handleCurrentChange(newPage) {
      this.queryInfo.pagenum = newPage
      this.getGoodsList()
    },
    // 删除商品
    async removeById(id) {
      const confirmResult = await this.$confirm('此操作将永久删除该商品, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)

      //   console.log(confirmResult)
      if (confirmResult !== 'confirm') return this.$message.info('已取消删除。')

      const { data: res } = await this.$http.delete(`goods/${id}`)
      if (res.meta.status !== 200) return this.$message.error('删除商品失败！')

      this.$message.success('删除商品成功！')
      this.getGoodsList()
    },
    // 跳转添加商品页面
    goAddPage() {
      this.$router.push('/goods/add')
    },
    // 查询并打开修改商品对话框
    async openEditGoods(id) {
      const { data: res } = await this.$http.get('goods/' + id)

      if (res.meta.status !== 200) return this.$message.error('获取商品信息失败！')

      this.editForm = res.data
      this.editGoodVisible = true
    },
    // 修改商品信息
    editGoods() {
      this.$refs.editFormRef.validate(async valid => {
        if (!valid) return 0

        const { data: res } = await this.$http.put(`goods/${this.editForm.goods_id}`, this.editForm)

        if (res.meta.status !== 200) return this.$message.error(res.meta.msg)

        this.$message.success('修改商品成功！')
        this.editGoodVisible = false
        this.getGoodsList()
      })
    },
    // 修改用户对话框关闭事件
    editDialogClosed() {
      this.$refs.editFormRef.resetFields()
    }
  }
}
</script>

<style lang="less" scoped>
</style>
